function openModule(Folder, File){
    var baseRef = location.href.substring(0,location.href.lastIndexOf('/') + 1);
    window.parent.fraLeftFrame.location.href= baseRef+"/data/"+Folder+"/"+File;
    window.parent.fraRightFrame.location.href=baseRef+"/data/"+Folder+"/menu.html";    
    
}
function ApplyCSS() {	  
		  	var leftdoc = window.parent.fraLeftFrame.document;
		  	var i_link = leftdoc.createElement('LINK');
				i_link.rel = 'stylesheet';
				i_link.type = 'text/css';
  			i_link.href = '../../css/style.css';
    	leftdoc.documentElement.childNodes[0].appendChild(i_link);
    	
    }
    
function OpenChapter(File){
    window.parent.fraLeftFrame.location.href= File;
    //window.parent.fraRightFrame.location.href="menu.html";
  	ApplyCSS();    //doesn't work, might be called from menu.html/.js
}